@import url('https://fonts.googleapis.com/css2?family=Merriweather&family=Open+Sans&family=Source+Code+Pro&family=Source+Code+Pro:wght@600&display=swap');

* {
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--text-color);
    background: var(--body-bg);
}

a {
   color: var(--link-color);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Merriweather', serif;
}

body { line-height: 1.5; }
nav { line-height: normal; }

:root {
    --header-height: 3em;
    --fragment-offset: calc(var(--header-height) + 1em);
    --content-width: 55vw;

    --header-bg: #f8f8f8;
    --body-bg: white;
    --code-bg: #f3f3f3;
    --text-color: black;
    --link-color: hsl(210, 100%, 30%);

    --implicit-arg-text-color: var(--text-color);

    --def-color: #92dce5;
    --def-color-hsl-angle: 187;
    --theorem-color: #8fe388;
    --theorem-color-hsl-angle: 115;
    --axiom-and-constant-color: #f44708;
    --axiom-and-constant-color-hsl-angle: 16;
    --structure-and-inductive-color: #f0a202;
    --structure-and-inductive-color-hsl-angle: 40;
    --starting-percentage: 100;

    --hamburger-bg-color: #eee;
    --hamburger-active-color: white;
    --hamburger-border-color: #ccc;

    --tags-border-color: #555;

    --fragment-offset: calc(var(--header-height) + 1em);
    --content-width: 55vw;
}
/* automatic dark theme if no javascript */
@media (prefers-color-scheme: dark) {
    :root {
        --header-bg: #111010;
        --body-bg: #171717;
        --code-bg: #363333;
        --text-color: #eee;
        --link-color: #58a6ff;

        --implicit-arg-text-color: var(--text-color);

        --def-color: #1F497F;
        --def-color-hsl-angle: 214;
        --theorem-color: #134E2D;
        --theorem-color-hsl-angle: 146;
        --axiom-and-constant-color: #6B1B1A;
        --axiom-and-constant-color-hsl-angle: 1;
        --structure-and-inductive-color: #73461C;
        --structure-and-inductive-color-hsl-angle: 29;
        --starting-percentage: 30;

        --hamburger-bg-color: #2d2c2c;
        --hamburger-active-color: black;
        --hamburger-border-color: #717171;

        --tags-border-color: #AAA;
    }
}

[data-theme="light"] {
    color-scheme: light;

    --header-height: 3em;
    --fragment-offset: calc(var(--header-height) + 1em);
    --content-width: 55vw;

    --header-bg: #f8f8f8;
    --body-bg: white;
    --code-bg: #f3f3f3;
    --text-color: black;
    --link-color: hsl(210, 100%, 30%);

    --implicit-arg-text-color: var(--text-color);

    --def-color: #92dce5;
    --def-color-hsl-angle: 187;
    --theorem-color: #8fe388;
    --theorem-color-hsl-angle: 115;
    --axiom-and-constant-color: #f44708;
    --axiom-and-constant-color-hsl-angle: 16;
    --structure-and-inductive-color: #f0a202;
    --structure-and-inductive-color-hsl-angle: 40;
    --starting-percentage: 100;

    --hamburger-bg-color: #eee;
    --hamburger-active-color: white;
    --hamburger-border-color: #ccc;

    --tags-border-color: #555;

    --fragment-offset: calc(var(--header-height) + 1em);
    --content-width: 55vw;
}

[data-theme="dark"] {
    color-scheme: dark;

    --header-bg: #111010;
    --body-bg: #171717;
    --code-bg: #363333;
    --text-color: #eee;
    --link-color: #58a6ff;

    --implicit-arg-text-color: var(--text-color);

    --def-color: #1F497F;
    --def-color-hsl-angle: 214;
    --theorem-color: #134E2D;
    --theorem-color-hsl-angle: 146;
    --axiom-and-constant-color: #6B1B1A;
    --axiom-and-constant-color-hsl-angle: 1;
    --structure-and-inductive-color: #73461C;
    --structure-and-inductive-color-hsl-angle: 29;
    --starting-percentage: 30;

    --hamburger-bg-color: #2d2c2c;
    --hamburger-active-color: black;
    --hamburger-border-color: #717171;

    --tags-border-color: #AAA;
}

@supports (width: min(10px, 5vw)) {
    :root {
        --content-width: clamp(20em, 55vw, 60em);
    }
}

#nav_toggle {
    display: none;
}
label[for="nav_toggle"] {
    display: none;
}

header {
    height: var(--header-height);
    float: left;
    position: fixed;
    width: 100vw;
    max-width: 100%;
    left: 0;
    right: 0;
    top: 0;
    --header-side-padding: 2em;
    padding: 0 var(--header-side-padding);
    background: var(--header-bg);
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
@supports (width: min(10px, 5vw)) {
    header {
        --header-side-padding: calc(max(2em, (100vw - var(--content-width) - 30em) / 2));
    }
}
@media screen and (max-width: 1000px) {
    :root {
        --content-width: 100vw;
    }

    .internal_nav {
        display: none;
    }

    body .nav {
        width: 100vw;
        max-width: 100vw;
        margin-left: 1em;
        z-index: 1;
    }

    body main {
        width: unset;
        max-width: unset;
        margin-left: unset;
        margin-right: unset;
    }
    body .decl > div {
        overflow-x: unset;
    }

    #nav_toggle:not(:checked) ~ .nav {
        display: none;
    }
    #nav_toggle:checked ~ main {
        visibility: hidden;
    }

    label[for="nav_toggle"]::before {
        content: '≡';
    }
    label[for="nav_toggle"] {
        display: inline-block;
        margin-right: 1em;
        border: 1px solid var(--hamburger-border-color);
        padding: 0.5ex 1ex;
        cursor: pointer;
        background: var(--hamburger-bg-color);
    }
    #nav_toggle:checked ~ * label[for="nav_toggle"] {
        background: var(--hamburger-active-color);
    }

    body header h1 {
        font-size: 100%;
    }

    header {
        --header-side-padding: 1ex;
    }
}
@media screen and (max-width: 700px) {
    header h1 span { display: none; }
    :root { --header-side-padding: 1ex; }
    #search_form button { display: none; }
    #search_form input { width: 100%; }
    header #autocomplete_results {
        left: 1ex;
        right: 1ex;
        width: inherit;
    }
    body header > * { margin: 0; }
}

header > * {
    display: inline-block;
    padding: 0;
    margin: 0 1em;
    vertical-align: middle;
}

header h1 {
    font-weight: normal;
    font-size: 160%;
}

header header_filename {
    font-size: 150%;
}
@media (max-width: 80em) {
    .header .header_filename {
        display: none;
    }
}

/* inserted by nav.js */
#autocomplete_results {
    position: absolute;
    top: var(--header-height);
    right: calc(var(--header-side-padding));
    width: calc(20em + 4em);
    z-index: 1;
    background: var(--header-bg);
    border: 1px solid #aaa;
    border-top: none;
    overflow-x: hidden;
    overflow-y: auto;
    max-height: calc(100vh - var(--header-height));
}

#autocomplete_results:empty {
    display: none;
}

#autocomplete_results[state="loading"]:empty {
    display: block;
    cursor: progress;
}
#autocomplete_results[state="loading"]:empty::before {
    display: block;
    content: ' 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 🐙 ';
    padding: 1ex;
    animation: marquee 10s linear infinite;
}
@keyframes marquee {
    0% { transform: translate(100%, 0); }
    100% { transform: translate(-100%, 0); }
}

#autocomplete_results[state="done"]:empty {
    display: block;
    text-align: center;
    padding: 1ex;
}
#autocomplete_results[state="done"]:empty::before {
    content: '(no results)';
    font-style: italic;
}

#autocomplete_results a {
    display: block;
    color: inherit;
    padding: 1ex;
    border-left: 0.5ex solid transparent;
    padding-left: 0.5ex;
    cursor: pointer;
}

#autocomplete_results .selected .result_link a {
    background: var(--body-bg);
    border-color: var(--structure-and-inductive-color);
}


#search_results {
    display: table;
    width: 100%;
}
#search_results[state="done"]:empty::before {
    content: '(no results)';
    font-style: italic;
}

#search_results .result_link, #search_results .result_doc {
    border-bottom: 1px solid rgba(0, 0, 0, 0.8);
}

.search_result {
    display: table-row;
}

.result_link, .result_doc {
    display: table-cell;
    overflow: hidden;
    word-break: break-word;
}

main, nav {
    margin-top: calc(var(--header-height) + 1em);
}

/* extra space for scrolling things to the top */
main {
    margin-bottom: 90vh;
}

main {
    max-width: var(--content-width);
    /* center it: */
    margin-left: auto;
    margin-right: auto;
}

nav {
    float: left;
    height: calc(100vh - var(--header-height) - 1em);
    position: fixed;
    top: 0;
    overflow: auto;
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
}

nav:hover {
    scrollbar-color: gray transparent;
}

nav {
    --column-available-space: calc((100vw - var(--content-width) - 5em)/2);
    --column-width: calc(var(--column-available-space) - 1ex);
    --dist-to-edge: 1ex;
    width: var(--content-width);
    max-width: var(--column-width);
}
@supports (width: min(10px, 5vw)) {
    .nav { --desired-column-width: 20em; }
    .internal_nav { --desired-column-width: 30em; }
    nav {
        --column-available-space: calc(max(0px, (100vw - var(--content-width) - 5em)/2));
        --column-width: calc(clamp(0px, var(--column-available-space) - 1ex, var(--desired-column-width)));
        --dist-to-edge: calc(max(1ex, var(--column-available-space) - var(--column-width)));
    }
}

.nav { left: var(--dist-to-edge); }
.internal_nav { right: var(--dist-to-edge); }

.internal_nav .nav_link, .taclink {
    /* indent everything but first line by 2ex */
    text-indent: -2ex; padding-left: 2ex;
}

.navframe {
    height: 100%;
    width: 100%;
}

.navframe .nav {
    position: absolute;
    left: 0;
    margin-left: 0;
}

.internal_nav .imports {
    margin-bottom: 1rem;
}

.tagfilter-div {
    margin-bottom: 1em;
}
.tagfilter-div > summary {
    margin-bottom: 1ex;
}

/* top-level modules in left navbar */
.nav .module_list > details {
    margin-top: 1ex;
}

.nav details > * {
    padding-left: 2ex;
}

.nav summary {
    cursor: pointer;
    padding-left: 0;
}

.nav summary::marker {
    font-size: 85%;
}

.nav .nav_file {
    display: inline-block;
}

.nav h3 {
    margin-block-end: 4px;
}

/* People use way too long declaration names. */
.internal_nav, .decl_name {
    overflow-wrap: break-word;
}

/* Add a linebreak after a declaration name. */
.decl_name::after {
    content: "\A";
    white-space: pre;
}

.nav_link {
    overflow-wrap: break-word;
}

.navframe {
    --header-height: 0;
}

#settings {
    margin-top: 5em;
}
#settings h3 {
    font-size: inherit;
}

#color-theme-switcher {
    display: flex;
    justify-content: space-between;
    padding: 0 2ex;
    flex-flow: row wrap;
}

/* custom radio buttons for dark/light switch */
#color-theme-switcher input {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    display: inline-block;
    box-sizing: content-box;
    height: 1em;
    width: 1em;
    background-clip: content-box;
    padding: 2px;
    border: 2px solid transparent;
    margin-bottom: -4px;
    border-radius: 50%;
}
#color-theme-dark { background-color: #444; }
#color-theme-light { background-color: #ccc; }
#color-theme-system {
    background-image: linear-gradient(60deg, #444, #444 50%, #CCC 50%, #CCC);
}
#color-theme-switcher input:checked {
    border-color: var(--text-color);
}

.decl > div, .mod_doc {
    padding-left: 8px;
    padding-right: 8px;
}

.decl {
    margin-top: 20px;
    margin-bottom: 20px;
}

.decl > div {
    /* sometimes declarations arguments are way too long
       and would continue into the right column,
       so put a scroll bar there: */
    overflow-x: auto;
}

/* Make `#id` links appear below header. */
.decl, h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] {
    scroll-margin-top: var(--fragment-offset);
}
/* don't need as much vertical space for these
inline elements */
a[id], li[id] {
    scroll-margin-top: var(--header-height);
}

/* HACK: Safari doesn't support scroll-margin-top for
fragment links (yet?)
https://caniuse.com/mdn-css_properties_scroll-margin-top
https://bugs.webkit.org/show_bug.cgi?id=189265
*/
@supports not (scroll-margin-top: var(--fragment-offset)) {
    .decl::before, h1[id]::before, h2[id]::before, h3[id]::before,
    h4[id]::before, h5[id]::before, h6[id]::before,
    a[id]::before, li[id]::before {
        content: "";
        display: block;
        height:      var(--fragment-offset);
        margin-top:  calc(-1 * var(--fragment-offset));
        box-sizing: inherit;
        visibility: hidden;
        width: 1px;
    }
}


/* hide # after markdown headings except on hover */
.markdown-heading:not(:hover) > .hover-link {
    visibility: hidden;
}

main h2, main h3, main h4, main h5, main h6 {
    margin-top: 2rem;
}
.decl + .mod_doc > h2,
        .decl + .mod_doc > h3,
        .decl + .mod_doc > h4,
        .decl + .mod_doc > h5,
        .decl + .mod_doc > h6 {
    margin-top: 4rem;
}

.def, .instance {
    border-left: 10px solid var(--text-color);
    border-top: 2px solid var(--text-color);
}

.theorem {
    border-left: 10px solid var(--theorem-color);
    border-top: 2px solid var(--theorem-color);
}

.axiom, .opaque {
    border-left: 10px solid var(--axiom-and-constant-color);
    border-top: 2px solid var(--axiom-and-constant-color);
}

.structure, .inductive, .class {
    border-left: 10px solid var(--structure-and-inductive-color);
    border-top: 2px solid var(--structure-and-inductive-color);
}

.fn {
    display: inline-block;
    /* border: 1px dashed red; */
    text-indent: -1ex;
    padding-left: 1ex;
    white-space: pre-wrap;
    vertical-align: top;
}

.fn { --fn: 1; }
.fn .fn { --fn: 2; }
.fn .fn .fn { --fn: 3; }
.fn .fn .fn .fn { --fn: 4; }
.fn .fn .fn .fn .fn { --fn: 5; }
.fn .fn .fn .fn .fn .fn { --fn: 6; }
.fn .fn .fn .fn .fn .fn .fn { --fn: 7; }
.fn .fn .fn .fn .fn .fn .fn .fn { --fn: 8; }
.fn {
    transition: background-color 100ms ease-in-out;
}

.def .fn:hover, .instance .fn:hover {
    background-color: hsla(var(--def-color-hsl-angle), 61%, calc(var(--starting-percentage) - 5%*var(--fn)));
    box-shadow: 0 0 0 1px hsla(var(--def-color-hsl-angle), 61%, calc(var(--starting-percentage) - 5%*(var(--fn) + 1)));
    border-radius: 5px;
}
.theorem .fn:hover {
    background-color: hsla(var(--theorem-color-hsl-angle), 62%, calc(var(--starting-percentage) - 5%*var(--fn)));
    box-shadow: 0 0 0 1px hsla(var(--theorem-color-hsl-angle), 62%, calc(var(--starting-percentage) - 5%*(var(--fn) + 1)));
    border-radius: 5px;
}
.axiom .fn:hover, .opaque .fn:hover {
    background-color: hsla(var(--axiom-and-constant-color-hsl-angle), 94%, calc(var(--starting-percentage) - 5%*var(--fn)));
    box-shadow: 0 0 0 1px hsla(var(--axiom-and-constant-color-hsl-angle), 94%, calc(var(--starting-percentage) - 5%*(var(--fn) + 1)));
    border-radius: 5px;
}
.structure .fn:hover, .inductive .fn:hover, .class .fn:hover {
    background-color: hsla(var(--structure-and-inductive-color-hsl-angle), 98%, calc(var(--starting-percentage) - 5%*var(--fn)));
    box-shadow: 0 0 0 1px hsla(var(--structure-and-inductive-color-hsl-angle), 98%, calc(var(--starting-percentage) - 5%*(var(--fn) + 1)));
    border-radius: 5px;
}

.decl_args, .decl_type .decl_parent {
    font-weight: normal;
}

.implicits, .impl_arg {
    color: var(--text-color);
    white-space: normal;
}

.decl_kind, .decl_name, .decl_extends {
    font-weight: bold;
}

/* break long declaration names at periods where possible */
.break_within {
    word-break: break-all;
}

.break_within .name {
    word-break: normal;
}

.decl_header {
    /* indent everything but first line twice as much as decl_type */
    text-indent: -8ex; padding-left: 8ex;
}

.decl_type {
    margin-top: 2px;
    margin-left: 4ex; /* extra indentation */
}

.imports li, code, .decl_header, .attributes, .structure_field_info,
        .constructor, .instances li, .equation, .result_link, .structure_ext_ctor {
    font-family: 'Source Code Pro', monospace;
}

pre {
    white-space: break-spaces;
}

code, pre { background: var(--code-bg); }
code, pre { border-radius: 5px; }
code { padding: 1px 3px; }
pre { padding: 1ex; }
pre code { padding: 0 0; }

#howabout code { background: inherit; }
#howabout li { margin-bottom: 0.5ex; }

.structure_fields, .constructors {
    display: block;
    padding-inline-start: 0;
    margin-top: 1ex;
    text-indent: -2ex; padding-left: 2ex;
}

.structure_field {
    display: block;
    margin-left: 2ex;
}

.inductive_ctor_doc  {
    text-indent: 2ex;
    font-family: 'Open Sans', sans-serif;
}

.structure_field_doc {
    text-indent: 0;
    font-family: 'Open Sans', sans-serif;
}

.structure_ext_fields {
    display: block;
    padding-inline-start: 0;
    margin-top: 1ex;
    text-indent: -2ex; padding-left: 2ex;
}

.structure_ext_fields .structure_field {
    margin-left: -1ex !important;
}

.structure_ext_ctor {
    display: block;
    text-indent: -3ex;
}

.constructor {
    display: block;
}
.constructor:before {
    content: '| ';
    color: gray;
}

/** Don't show underline on types, to prevent the ≤ vs < confusion. **/
a:link, a:visited, a:active {
    color:var(--link-color);
    text-decoration: none;
}

/** Show it on hover though. **/
a:hover {
    text-decoration: underline;
}

.impl_arg {
    font-style: italic;
    transition: opacity 300ms ease-in;
}

.decl_header:not(:hover) .impl_arg {
    opacity: 30%;
    transition: opacity 1000ms ease-out;
}

.gh_link {
    float: right;
    margin-left: 10px;
}

.ink_link {
    float: right;
    margin-left: 20px;
}


.docfile h2, .note h2 {
    margin-block-start: 3px;
    margin-block-end: 0px;
}

.docfile h2 a {
    color: var(--text-color);
}

.tags {
    margin-bottom: 1ex;
}

.tags ul {
    display: inline;
    padding: 0;
}

.tags li {
    border: 1px solid var(--tags-border-color);
    border-radius: 4px;
    list-style-type: none;
    padding: 1px 3px;
    margin-left: 1ex;
    display: inline-block;
}

/* used by nav.js */
.hide { display: none; }

.tactic, .note {
    border-top: 3px solid #0479c7;
    padding-top: 2em;
    margin-top: 2em;
    margin-bottom: 2em;
}
